Barrel inspection light



June 7, 1960 E. s. RYEN BARREL INSPECTION LIGHT 2 Sheets-Sheet 1 FiledApril 18, 1957 INVENTOR. BY Far? 5. Rye

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June 7, 1960 E. s. RYEN BARREL INsPcnoN LIGHT 2 Sheets-Sheet 2 FiledApril 18, 1957 INVENTOR.

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Earl S. Ryen,` Netlrow,v N.Y., assignor' to Crouse-Hinds Company,Syracuse, N.Y., a corporation of New York Filed Apr. 18, 1957, Sen-No.653,604

1 Claim. (CI. 24U-2.18)

This invention relates to a light unit intended particularly for use ininspecting the interior of containers, such as barrels, tanks, etc.

The invention has as an object a light unit of minimum diameter topermit insertion of the light through a bung hole of a barrel, or iilleropening in a tank, and embodying an arrangement whereby the light is ofthe so-called explosion proof type, permitting its use in hazardouslocations and providing for the convenient relamping of the unit. f

The invention consists in the novel features and in the combinations andconstructions hereinafter set forth and claimed.

In describing this invention, reference is had to the accompanyingdrawings in which like characters designate corresponding parts in allthe views.

In the drawings- Figure l is a cross section of my invention.

Figure 2 is a cross section taken on line 2-2 of Figure 1.

Figure 3 is a cross section taken on line 3 3 of Figure l.

Figure 4 is a cross section of a modification of my invention.

Figure 5 is a cross section taken on line 5 5 of Figure 4.

Figure 6 is a cross section taken on line 6-6 of Figure 4.

Referring now to the form of the invention illustrated by Figures 1, 2and 3, the barrel inspection lamp is made up of a hollow elongated body10 being externally threaded 11 at its outer end and internally threaded12 at its inner end. Mounted in the outer end of the body, as by snapring 13, is a lamp receptacle 14 having the necessary leads 15 and 16.The receptacle 14 has a lamp 17 mounted therein. Threadedly mounted onthe outer end of the body 10 is a lamp guard composed of an innercylindrical portion 20 and three elongated r-ibs 21, 22 and 23 (seeFigure 2) terminating in a closed end portion 24 which has an attachinghook 25 aixed thereto. The lamp guard 20 carries a reilector 26 by meansof a mounting plate 27 having a pair of nipples 28, 29 mounted in a slot30 of the rib 22.

A globe 31 mounted in the lamp guard at its outer end presses against agasket 32, and a metallic seal 33 is cast on the inner end of the globewhich is engaged by a nut 34 threaded in the lower end of the lampguard. The seal 33 is of cylindrical formation snugly encircling theopen end portion of the globe. The peripheral surface snugly engages theinner surface of the portion 20 of the guard, all whereby the globe isattached to the body in flame tight relation.

The guard is threadedly mounted on the body 10 and is xed againstrotation by means of a set screw 35 which is inserted in the body 10after the guard 20 has been threaded onto the body 10 and secures theguard 20 against rotation by reason of the fact that the lower edgenited States Patent O.

2,939,945 Patented June 7, 1960 fice 36 of the guard 20 is scalloped topartially receive the set screw 35.l

Threaded-ly mounted. in the inner end of the body 1.0 is a terminalblock. 40 having three terminals 41, 42 and 43 at its lower end, seeFigure 3, the terminals 41, 42 are the power terminals and have leadsgenerally indicated at 45 which are connected to the leads 15 and 16 toroperate the lamp 17.

The terminal- 43 isa grounding. terminal and has a connection to body 10through washer 46 which is held irmly in` place by screw 47. Alsoterminal 43l has a connection to wire clamp 55 by means of the groundingspring 48.

The lamp receptacle 14 and the terminal block 40 are spaced at oppositeends of the body 10 so as to form a wire cavity 50 for the reception ofthe leads 15, I6 and 45', and the central portion of the body 10 has aninsulating cylinder 51 surrounding the body. Aixed to the lower end ofthe terminal block is a wire clamp 55 having a tapered cord clampbushing 56 in its lower end. An insulating sleeve 57 having a tapercomplemental to the taper of the bushing 56 is carried in the wire clamp55 to contract the inner portion of the bushing to eect a seal withinthe cord.

The lamp 17 is mounted in explosion proof relation in the receptacle 14by reason of the fact that there is a long smooth running snug litbetween the sleeve 33 and the inner cylindrical end of the lamp guard20, thus providing a ame extinguishing path between the interior of thebody 10 and the atmosphere, as will be apparent to those skilled in theart.

Referring now to the modification of my invention illustrated by Figures4 through 6, it w-ill be seen that my modied inspection lamp is made upof a body 70, which has external threads 71 and 72 at its upper andlower ends respectively. The body 70 has a lamp receptacle 73 mounted inits upper end, as by a snap ring 74. A lamp 75 is mounted in thereceptacle 73. A lamp guard composed of an inner cylindrical portion 76and three elongated ribs 77, 78 and 79 is threadedly mounted on theouter end of the body 70. The lamp guard has an attaching hook 80 aixedto its outer end. Aihxed to the lamp guard is a reilector 81 carried bya mounting plate 82 which is mounted in a grooved rib 78 by a pair ofbeads 83, S4. The lamp guard carries a globe 85 which encircles andprotects the lamp 75. Sleeve S7, gasket S6 and mounting nut 88 areutilized to mount the globe 85 in the guard 76 as in the form of theinvention described previously and disclosed in Figures 1 3. Anexplosion proof seal is eiected between the globe 85 and the lamp guard70 by means of the sleeve 87 and the inner end of the guard 76 as waspreviously explained in connection with the description of the form ofthe invention illustrated by Figures 1-3.

Mounted in the lower or inner end of the body 70 is a terminal block 90having terminals 91, 92 and 93. Depending from the inner end of thereceptacle 73 are leads 94, 95, which are connected in the wire cavity96 in the body 70 to suitable leads 97, from the power terminals 91 and92. The terminal 93 has a grounding connection to the body 70 throughthe grounding screw 98 and a grounding lead 99. Threadedly attached tothe lower end of the body 70 is a connector 100 which has an insulator101 mounted therein, as by an insulating washer 102. Threaded in thelower end of the connector is an extension member 105 which has a cordclamp 106 aixed to its lower end by means of a threaded sleeve 107 andthe set screw 108. The cord clamp 106 carries the insulator 110 whichencloses the necessary power leads, as will be familiar to those skilledin the art.

It will thus be seen by both of my forms of invention I have provided aninspection light of minimumdiameter which is explosion proof.

What I claim is: An electrical hand lamp vcomprising a cylindricalbodythreaded at its ends, a lamp receptacle detahably mountedv in theforwardY end of the bodyfor the rception of-a tion, a cylindrical lampenclosing globe positioned in saidV guard, said globe being closedratits outer end and open at its inner end confronting said receptacle, asealing member Vcasteon the inner end portion of said globe andextending axially along said globe to effect an explosion proof path,said sealingV member snugly vengaging the inner surface of thecylindrical Vend portion of said guard in explosionproof fashion, a ringnut threaded into Ysaid cylindrical portion of 4the guard for detachablysecuring 'said globe in said guard, a terminal breek having threadedconnection tothe rear end'of said body, Ya plurality ofv terminalsmounted in said block in ame tight relation thereto, a cord gripcarrying "member aixed to the rear end of the body assembly, said body,guard and cord grip carrying member Ybeing of substantially'the samediameter. l I, l t

References Cited ini-the le of patent UNITED STATES'PATENTS 2,163,673 tGarlrocrk v r June 27, 1939 2,228,680 Tornblom Ian. 14, 1941 2,316,835Blood V Apr. 20, 1943 2,574,882 McDowell et al YNGV. 13, 1951 FOREIGNPATENTS Y Y 586,006 VGermany'.l ,.Ln Oct; 14, 1933l

